Explore tens of thousands of sets crafted by our community.
Cell Structures and Functions
29
Flashcards
0/29
What is the central vacuole and its role in plant cells?
The central vacuole is a large, water-filled organelle that provides structural support, stores nutrients and waste products, and helps in plant growth.
What is the function of the nucleolus?
The nucleolus is involved in the production and assembly of ribosome components within the nucleus.
What is the function of the mitochondria?
The mitochondria are the powerhouse of the cell, providing energy through ATP by the process of cellular respiration.
What is the purpose of the cytoskeleton?
The cytoskeleton provides structural support for the cell, aids in cell division, and facilitates cell movement and intracellular transport.
What is the structure and function of the plasma membrane?
The plasma membrane is a phospholipid bilayer that controls the movement of substances into and out of the cell, maintaining homeostasis.
What is the role of ribosomes?
Ribosomes are responsible for protein synthesis by reading mRNA and linking together amino acids.
What is the function of the Golgi apparatus?
The Golgi apparatus modifies, sorts, and packages proteins and lipids for storage or transport out of the cell.
Describe the function of microtubules.
Microtubules are part of the cytoskeleton and help in maintaining cell shape, cell division, and intracellular transport of organelles and vesicles.
What are lysosomes and what do they do?
Lysosomes are membrane-bound organelles that contain enzymes for breaking down cellular waste and debris.
How do chloroplasts function in a cell?
Chloroplasts are the sites of photosynthesis in plant cells, converting light energy into chemical energy stored as glucose.
What is the role of transport vesicles?
Transport vesicles move molecules between different locations inside the cell, such as between the endoplasmic reticulum and Golgi apparatus.
How does the smooth endoplasmic reticulum function?
The smooth endoplasmic reticulum synthesizes lipids, metabolizes carbohydrates, detoxifies drugs and poisons, and stores calcium ions.
Explain the process of endocytosis.
Endocytosis is the process by which the cell takes in materials by engulfing them in a section of the plasma membrane that pinches off to form an internal vesicle.
What is the significance of interphase in the cell cycle?
Interphase is the longest phase of the cell cycle where the cell grows, performs its functions, duplicates DNA, and prepares for division.
What role does the rough endoplasmic reticulum play in the cell?
The rough endoplasmic reticulum is studded with ribosomes and is involved in protein synthesis, modification, and transport.
What is the significance of the nucleoplasm?
The nucleoplasm is the semi-fluid substance within the nucleus, providing a medium for the suspension of nuclear structures like nucleotides and enzymes.
What does the term 'extracellular matrix' refer to?
The extracellular matrix is a network of proteins and carbohydrates outside the cell that provides structural and biochemical support to surrounding cells.
What is a centrosome and what role does it play during cell division?
A centrosome is an organelle near the nucleus in animal cells that contains centrioles and serves as a microtubule-organizing center during cell division.
What are peroxisomes and what is their function?
Peroxisomes are organelles that contain enzymes for breaking down fatty acids and detoxifying harmful substances.
Define the term 'plasmodesmata'.
Plasmodesmata are channels that traverse the cell walls of plant cells, allowing transport and communication between neighboring cells.
How do cell junctions function?
Cell junctions are structures that connect cells to each other, facilitating communication and creating tissue stability by providing a seal or a mechanical linkage.
What is the purpose of cell wall in plant cells?
The cell wall is a rigid layer outside the plasma membrane that provides protection, structural support, and shape to plant cells.
Describe how actin filaments work in a cell.
Actin filaments, also known as microfilaments, are part of the cytoskeleton and play a role in cell movement, shape, and division.
What is the significance of the nucleotide 'ATP' in cellular activities?
ATP, or adenosine triphosphate, serves as the main energy currency of the cell, powering various cellular processes by releasing energy when it's converted to ADP.
How do gap junctions function in cells?
Gap junctions are specialized intercellular connections that allow for direct chemical and electrical signaling between cells by forming channels.
Explain the purpose of cellular respiration.
Cellular respiration is the process by which cells convert glucose into ATP, releasing energy stored in the chemical bonds of glucose.
What is osmosis in the context of cell membrane function?
Osmosis is the diffusion of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.
What is autophagy in cells?
Autophagy is the process by which cells degrade and recycle their own components through the formation of autophagosomes that fuse with lysosomes.
What is a flagellum and what is its function?
A flagellum is a whip-like structure that enables movement in certain cells, propelling the cell through its environment.
© Hypatia.Tech. 2024 All rights reserved.